Please help with ID of these mammillaria

1: hahniana? diameter: 14 cm
2: rhodanta?
3: unknown
4: unknown

1. Not sure, could be hahniana r a short spined geminispina
2. Yes, I'd say rhodantha, maybe ssp. pringlei or aureiceps
3. First glance, I thought that's not a Mamm its a Parodia. The look of the plant and a hooked golden central (1) didn't ring any bells. It also looks like the growing point is elongating.
4. Could be a karwinskiana.

But not entirely sure.

Thank you  very much, Chris. Regarding no. 3 you are right with parodia. After some googling it seems to be parodia microsperma.